[1]Nearly four years after the Summer Olympics came to Beijing, the structure that hosted the opening ceremonies and the track and field events—popularly known as the "Bird's Nest"—has fallen into disuse. It's hard to find events that will attract anywhere close to the 91,000 spectators the venue holds, according to this story from NPR[2], and tourist interest is waning.The Bird's Nest cost $480 million to build, and it costs an additional $11 million each year to maintain. Since the Games, it has hosted a temporary winter theme park (complete with snow tubing), 15-minute Segway tours of the track (which cost $20), and a tightrope walker who spent two months living on a line, suspended across the Nest, in an attempt to set a world record.The Water Cube, where the swimming events were held, is faring better—it's been converted into a water park—but it's still barely breaking even, even with government subsidies.To read the complete story, click here[2]. (Photo by Victah Sailer/PhotoRun)